St. Helena Health
Underpayment Detection Agent
Step-by-Step Testing Scenario: How to Run a Complete Payment Integrity Analysis Using the Agent
Overview
This document provides a guided walkthrough that allows you to test the Underpayment Detection Agent through a realistic, end-to-end revenue recovery scenario. You will play the role of a CFO or payer-strategy leader; the agent will respond with analysis, findings, and recommendations based on St. Helena Health's sample data.
Time Required
10–15 minutes
Outcome
Complete understanding of how the agent detects, quantifies, prioritizes, and recovers underpayments
Establish Context and Request Status
(3 minutes)Your Prompt (Copy and paste into the agent):
"Good afternoon. I'm the CFO of St. Helena Health. We have approximately $650M in annual net patient revenue across five commercial payers, one Medicare Advantage plan, and one Medicaid MCO. I'm concerned we may be losing revenue to underpayments and improper payer adjustments, but I have limited visibility into the issue. Can you give me a quick status overview of payment integrity across our payer portfolio? Are there any systematic underpayment patterns I should know about?"
What the Agent Should Respond With:
- Acknowledgment of St. Helena Health's profile
- Overview of payment processing scope (total claims analyzed, time period, payers included)
- Key finding: YES, systematic underpayment patterns have been detected
- Summary: 4 major patterns affecting ~4,300 claims, totaling $244K in historical underpayments and $333K+ in annualized leakage
- Offer to drill into specifics
Why This Matters:
- • Sets the stage: you get confirmation that the system is actively monitoring and has already done the hard work
- • Executive gets assurance that this is not speculative—real underpayments have been detected in the data
Deep Dive on the Largest Single Pattern
(2 minutes)Your Prompt:
"Tell me about the largest underpayment pattern. What's happening, how did you catch it, and how much is it costing us annually?"
What the Agent Should Respond With:
Pattern: Fee Schedule Lag on Office Visits
The Issue: ApexCommercial is pricing CPT 99213 (office visit, established patient) at $98.00, but our 2025 contract specifies $105.00. This is a $7.00 underpayment per claim.
Scale of the Problem:
- • Claims affected: 2,500 over 9 months
- • Historical underpayment: $17,500
- • Annualized leakage if uncorrected: $23,300
Root Cause:
Payer failed to load the 2025 professional fee schedule into their claims system. The error began exactly on the contract effective date (1/1/2025), indicating a system configuration failure.
How the Agent Caught It:
- • Applied the contracted fee schedule ($105) to all 99213 claims
- • Compared expected vs. actual paid amounts
- • Identified a consistent -$7.00 variance on 94% of claims
- • Aggregated the pattern across all 2,500 claims
- • Recognized the error began precisely at contract anniversary
Recovery Opportunity:
Recoverability: 85–90% (clear contract violation, payer system error)
Recommended action:
- • Batch appeal on all in-window claims with 2025 fee schedule attached
- • Direct contact to payer's IT and contracting teams requesting system correction
- • Post-fix monitoring to confirm remediation
Timeline: 30–60 days for full recovery and system correction
Explore Pattern 2 – Bilateral Procedure Mispricing
(2 minutes)Your Prompt:
"Understood on the office visits. What about our surgical procedures? Are bilateral cases being paid correctly?"
What the Agent Should Respond With:
Pattern: Bilateral Modifier Logic Error
The Issue: HorizonHealth is misapplying bilateral modifier (modifier 50) logic on outpatient orthopedic procedures.
Contract rule: First side = 100% of fee schedule; second side = 50%
Payer behavior: Paying 50% on both sides instead
Example:
For CPT 27447 (knee arthroplasty revision) at $320/side:
- • Expected payment: $320 (first side) + $160 (second side) = $480 total
- • Actual payment: $320 (treating both sides at 50%)
- • Underpayment: $160 per claim
Scale of the Problem:
- • Claims affected: 600 over 6 months
- • Historical underpayment: $32,800
- • Annualized leakage: $65,000
Root Cause:
Payer system update in early 2025 broke bilateral modifier logic. The system now treats all bilateral units at the reduced rate instead of only the second side.
Examine Pattern 3 – Hidden Partial Payments
(2 minutes)Your Prompt:
"Those two patterns are concerning. What about our ED claims? Are we getting paid for imaging procedures ordered from the ED?"
What the Agent Should Respond With:
Pattern: ED + CT Imaging Carve-Out Violation
The Issue: MetroPlus Commercial is bundling CT imaging into ED facility payments, despite explicit contract language carving out CT at a separate APC rate.
How It's Hidden:
- • Claims appear "paid" on a single line item
- • CT charges are zeroed out using CO-97 (bundling) codes
- • The underpayment is buried and not visible in standard A/R aging reports
- • Account closes as "paid," but actual compensation is short
Contract vs. Reality:
Contract specifies: ED facility = $380 APC; CT imaging = $420 APC (separate carve-out)
Payer behavior: ED facility paid $380, CT imaging paid $0 (bundled into ED)
Underpayment per ED+CT combo: $420
Scale of the Problem:
- • Claims affected: 1,200 over 12 months
- • Average underpayment: $52.00 per claim
- • Historical underpayment: $45,760
- • Annualized leakage: $45,000
How the Agent Caught It:
- • Examined line-level remittance detail, not just account-level aging
- • Identified CO-97 (bundling) codes paired with $0 payments on imaging lines
- • Applied contract carve-out logic (CT should be separately payable)
- • Compared expected ($420 for imaging) vs. actual ($0) across line items
- • Aggregated pattern across 1,200 ED+CT combinations
- • Flagged for zero-balance re-audit
Why Traditional Tools Miss This:
- • A/R Aging reports: Show accounts as "paid and closed" so the buried underpayment disappears
- • Denial reports: Don't catch this because claims weren't denied; they were marked paid (but short-paid)
- • Billed vs. paid summaries: Don't perform line-level contract validation
- • Standard BI dashboards: Compare billed vs. paid but don't model carve-out rules
Address Pattern 4 – Unsubstantiated Offsets
(3 minutes)Your Prompt:
"So I see fee schedule lags, modifier logic errors, and bundling misapplications. I assume there's a fourth pattern? What else are you seeing?"
What the Agent Should Respond With:
Pattern: Unsubstantiated Provider Level Balance (PLB) Offsets
The Issue: Two large national payers (NatlPlanA and NatlPlanB) are reducing current payments via Provider Level Balance (PLB) offsets, claiming prior overpayments. Most offsets lack supporting documentation.
Specific Findings:
NatlPlanA – $85,000 in unsubstantiated offsets:
- • Offsets claim prior overpayments but reference IDs cannot be traced
- • No linked source claims in provider's records
- • No documentation showing what overpayment was claimed or how calculated
- • Examples: Reference "OP-UNKNOWN-1" with no support; reference "YEAR-END-ADJ" with no detail
NatlPlanB – $63,000 in insufficiently documented offsets:
- • Offsets cite valid claim IDs (e.g., "OP-12345")
- • But lack supporting detail: original payment amount, recalculation, reason for recoupment
- • Provider accepts offsets without validation because they come from payer
Total Disputed Offsets: $148,000
Annualized Leakage if offsets continue: $200,000+ (if similar pattern continues)
Recovery Opportunity:
Recoverability: 60–80% (depends on payer cooperation and documentation quality)
Recommended action:
- Immediate: Issue Request for Information (RFI) to both payers: "Provide complete documentation for all PLB offsets posted since 2024"
- Validation: For each offset, verify that an actual overpayment occurred
- Reversal: Reverse any offset without traceable, documented overpayment basis
- Escalation: If payer doesn't respond within 30 days, escalate to Legal
Critical Compliance Point:
DO NOT unilaterally reverse offsets. This violates compliance and payer relationship protocols.
Correct approach:
- • Demand documentation. Payers MUST justify every offset with traceable source claim and overpayment calculation
- • Validate independently. Only reverse if you confirm no actual overpayment occurred
- • Refund legitimate overpayments. If you discover a real overpayment, you must refund it within 60 days (federal rule)
- • Escalate to Legal. If payer refuses documentation and continues improper offsets, involve legal counsel
Prioritize Recovery Actions
(2 minutes)Your Prompt:
"Let me make sure I understand the full picture. How much are we losing, and what should I prioritize?"
Summary Table:
| Pattern | Payer(s) | 12-Mo Underpayment | Annualized Leakage | Recovery Likelihood | Priority |
|---|---|---|---|---|---|
| Fee Schedule Lag (99213) | ApexCommercial | $17,500 | $23,300 | 85–90% | #1 |
| Bilateral Mispricing | HorizonHealth | $32,800 | $65,000 | 80–90% | #2 |
| ED + CT Carve-Out | MetroPlus | $45,760 | $45,000 | 70–80% | #3 |
| PLB Offsets | NatlPlanA/B | $148,000 | $200,000+ | 60–80% | #4 |
| TOTAL | $244,060 | $333,300+ | — | — | |
Executive Summary:
"These four patterns represent $244K in detected historical underpayments and $333K+ in annualized leakage."
Week 1: File batch appeal for Pattern 1 (fee schedule lag)—highest confidence, fastest payback
Weeks 2–4: Compile evidence and appeal for Patterns 2 and 3—strong contractual foundation
Concurrent: Issue RFI for Pattern 4 (offsets)—largest single pattern, requires negotiation
Expected Year 1 outcome: $244K immediate recovery + $333K+ annualized prevention = $577K+ total value
Run a "What-If" Scenario
(2 minutes)Your Prompt:
"Excellent. If we successfully execute on the ApexCommercial fee schedule lag—both appealing the historical underpayment and getting them to correct their system for the remaining year—how much will that improve our Year 1 financial outcome?"
Scenario Analysis:
Scenario A: Successful Appeal + System Correction (Optimal)
- • Historical recovery via appeal: +$17,500
- • Payer system corrected on Day 15: Fee schedule updated to $105
- • Remaining 3 months of 2025: No leakage (system corrected)
- • Year 1 impact: +$16,528 net recovery
- • Plus: Prevention of $23,300 in annual leakage Year 2+
Probability: 85–90%
Scenario B: Partial Success (Realistic)
- • Historical recovery: 70% × $17,500 = +$12,250
- • Payer system correction takes longer (60 days): Leakage continues for 2 more months = -$3,888
- • Year 1 impact: +$8,362 net recovery
- • System corrected for last month of year
Scenario C: No Action
- • Leakage continues all year: -$23,300
- • Year 1 outcome: -$23,300
Agent Recommendation:
"Based on ApexCommercial's track record, I'd estimate Scenario A (85–90% probability). The contract language is unambiguous, the error is clearly a payer system issue, and ApexCommercial will likely want to resolve this quickly."
Expected outcome: $16.5K–$20K net recovery Year 1, plus $23.3K annual savings Year 2+. Total present value: ~$40K+ just from this one pattern.
Generate an Executive Brief
(2 minutes)Your Prompt:
"Perfect. Now I need to brief my board and CEO on this analysis. Can you generate a one-page executive brief summarizing the findings, financial impact, and recommended actions?"
EXECUTIVE BRIEF
St. Helena Health Payment Integrity Analysis
DATE: January 17, 2026
PREPARED FOR: Board of Directors / C-Suite Executive Team
CLASSIFICATION: Confidential
KEY FINDING
St. Helena Health has identified $244,060 in systematic underpayments from commercial and national payers over the past 12 months, representing $333,300+ in annualized revenue leakage if left uncorrected. These underpayments stem from four distinct payer system errors and improper recoupments affecting 4,300+ claims.
BOTTOM LINE
Our payers are systematically underpaying us. We have identified the issues with precision, quantified the impact, and have a clear roadmap to recover and prevent future leakage. This is high-confidence, high-impact, low-complexity revenue recovery. Recommend immediate execution starting this week.
EXPECTED OUTCOMES
- • Year 1 recovery: $244K (historical underpayments)
- • Annual prevention: $333K+ (if patterns corrected)
- • Total Year 1 value: $577K+ in revenue protection and recovery
- • ROI: 10–20x if implementation cost <$50K
What to Look For:
- • Brief is actually one page (or just over)
- • Numbers are specific and traceable (sourced from agent analysis)
- • Actions are time-bound and assigned (this week, weeks 2–4, ongoing)
- • Executive summary is clear and actionable
- • Tone is confident but not alarmist; focuses on opportunity, not failure
Validation and Compliance Check
(1 minute)Your Optional Prompt:
"Before we execute on these recoveries, I want to make sure we're on the right side of compliance. Are there any legal, regulatory, or payer relationship risks I should be aware of?"
Compliance & Risk Assessment:
Green Lights (Low Risk):
- • Patterns 1–3 have clear contractual bases; underpayments are defensible
- • Appeals follow standard timely-filing rules
- • No overpayment refund issues with these patterns
- • No False Claims Act exposure
Yellow Flags (Monitor):
- • Pattern 4 (offsets): Ensure we don't reverse offsets for legitimate overpayments
- • Action: Validate each offset independently before reversing
- • Rule: Any legitimate overpayment must be refunded within 60 days (federal requirement)
- • Payer relationships: May be strained during appeals—use professional, evidence-based communication
Agent Bottom Line:
"You're on solid compliance ground. The underpayments are real, the contract violations are clear, and your recovery actions are defensible. The only compliance discipline is Pattern 4: ensure you validate offsets before reversing and refund any legitimate overpayments promptly. That said, demanding documentation is entirely appropriate and professional."
Quick Reference: Prompts to Use
If you want to jump straight to testing without following the full scenario, try these in any order:
Status & Overview
- 1. "Are we being systematically underpaid by any payer?"
- 2. "What's the total financial impact of all underpayments you've detected?"
Pattern Deep Dives
- 3. "Show me the fee schedule lag pattern"
- 4. "Explain the bilateral procedure mispricing"
- 5. "How did you catch the ED + CT imaging carve-out violation?"
- 6. "What's happening with the PLB offsets?"
Prioritization & Strategy
- 7. "Rank our recovery opportunities by impact"
- 8. "What should I prioritize first, and why?"
- 9. "What's our Year 1 financial outcome?"
Communication
- 10. "Generate an executive brief for our board"
- 11. "What compliance risks should I be aware of?"
- 12. "Summarize our status in 3 bullet points"